x-(90-x)=10

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Solution for x-(90-x)=10 equation: 



x-(90-x)=10

We move all terms to the left:

x-(90-x)-(10)=0

We add all the numbers together, and all the variables

x-(-1x+90)-10=0

We get rid of parentheses

x+1x-90-10=0

We add all the numbers together, and all the variables

2x-100=0

We move all terms containing x to the left, all other terms to the right

2x=100

x=100/2

x=50

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